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中央空调(central air-conditioner,CAC)作为一种典型可控负荷,具有良好的需求响应潜力。该文针对传统控制策略CAC主机直接启停方式的局限性,提出一种基于参数序列化的CAC变负载率(variable load rate,VLR)调节控制策略。首先,以常规水冷CAC为研究对象,基于不同运行模式特征对主机热力学动态建模。其次,基于参数序列化技术,考虑用户舒适度及CAC锁定约束,以室内温度为序列化参数形成响应群体筛选队列,根据响应目标确定可控群体;采用VLR方法,对可控群体进行精细化负载率调节。最后,在仿真算例中,比较了本文方法与传统启停策略的差异,分析了锁定约束对控制效果的影响。在工作模式下,模拟上层电网控制中心下发调控信号,实现削峰效果。结果表明:基于参数序列化技术,能够保证用户的舒适度,筛选出适合调控的CAC负荷群体;结合VLR方法,实现对CAC负荷群的精细化调节,目标值响应精度更高。
As a typical controllable load, central air-conditioner (CAC) has good demand response potential. Aiming at the limitation of the traditional control strategy CAC host direct start-stop mode, this paper proposes a control strategy based on parameter serialization CAC variable load rate (VLR) regulation. First of all, taking conventional water-cooled CAC as the research object, the dynamics of host thermodynamics are modeled based on the characteristics of different operating modes. Secondly, based on the parameter serialization technique, user comfort and CAC locking constraints are considered, the response queue is formed by using the indoor temperature as the serialization parameter, and the controllable group is determined according to the response target. The VLR method is used to control the fine load Rate adjustment. Finally, in the simulation example, the difference between this method and the traditional start-stop strategy is compared, and the effect of locking constraints on the control effect is analyzed. In working mode, the simulation control signal issued by the upper grid control center, to achieve peak clipping effect. The results show that, based on the parameter serialization technology, the user comfort can be ensured and the CAC load population suitable for regulation can be screened out. Combined with the VLR method, the fine adjustment of the CAC load population can be achieved and the target value response accuracy is higher.